Unbranded 1 A5.4 B5.8 6-1/8" Od.  Single Groove Belt Pulley / Sheave has a 1610 bushing with a 7/8" Bore.

 
 
This is surplus to a now closed factory that kept spare parts on the shelf the boxes may show shelf wear and have some dust on them.
 
 
[Please Look at all the pictures they are part of the description]  
 
                                                                                                          [Cart 0443]